KR20080014625A - Aqueous suspended pesticidal composition - Google Patents

Abstract

An aqueous suspended pesticidal composition is provided to be hard to separate and precipitate solid phase under the composition preservation conditions, thereby being difficult to generate a hard cake. An aqueous suspended pesticidal composition comprises 0.5-50 wt.% of a solid water-insoluble pesticidal active compound, 0.1-5 wt.% of a sucrose ester of a fatty acid, 0.1-5 wt.% of an anionic surfactant such as polyoxyethylenearylphenylether phosphate and alkyl sulfate, 0.1-3 wt.% of a montmorillonite-based mineral fine powder, 0.1-5 wt.% of a water-soluble polymer dispersant such as polyvinylalcohol and carboxymethylcellulose salt and water. A method for spraying a pesticide comprises a step of directly spraying the aqueous suspended pesticidal composition to the bottom of reserved water.

Description

Aqueous Suspension Pesticide Composition {AQUEOUS SUSPENDED PESTICIDAL COMPOSITION}

The present invention relates to an aqueous suspension pesticide composition.

Agrochemical formulations capable of dispersing agrochemically active compounds in a simpler manner are required for the aging of agricultural workers and the reduction of the number of employees. As a formulation containing a solid, poorly water-soluble pesticide active compound, pesticide compositions in the form of powders and granules are mainly used. For example, they are directly dispersed from the shelter before passing under fresh water. An aqueous suspension-type pesticide composition which can be used is also put into practical use (for example, see Unexamined-Japanese-Patent No. 5-163106).

An aqueous suspension pesticide composition is a preparation in which a finely divided, poorly water-soluble pesticide active compound is suspended in water with a surfactant, thickener, or the like, and the solid poorly water-soluble pesticide active compound is about 5 μm or less. Because of its small particle size, a relatively high effect can be expected. However, as a preparation, it is easy to produce hard cakes which are unstable in physicochemical properties, and the solid phase is separated and precipitated during storage, and the precipitated solid phase is difficult to redisperse. For this reason, there is a need for an aqueous suspended pesticide composition which is difficult to separate solids and produce hard cakes under the conditions of preparation.

The present invention provides an aqueous suspended phase pesticide composition that is difficult to separate a solid phase or produce a hard cake, and includes the following invention, for example.

[Invention 1]

An aqueous suspended aqueous pesticide composition comprising a solid, poorly water-soluble pesticide active compound, sucrose fatty acid ester, anionic surfactant, montmorillonite mineral fine powder, a water-soluble polymer dispersant, and water.

[Invention 2]

With respect to the aqueous suspension pesticide composition, 0.5 to 50% by weight of the poorly water-soluble pesticide active compound, 0.1 to 5% by weight of sucrose fatty acid ester, 0.1 to 5% by weight of anionic surfactant, montmorillonite mineral fine powder It is 0.1 to 3 weight%, and the water-soluble polymer dispersing agent is 0.1 to 5 weight%, The aqueous suspension pesticide composition of invention 1 characterized by the above-mentioned.

[Invention 3]

The aqueous suspension pesticide composition according to the invention 1 or 2, wherein the anionic surfactant is at least one member selected from the group consisting of polyoxyethylenated arylphenyl ether phosphate and alkyl sulfates.

[Invention 4]

The aqueous suspended aqueous pesticide composition according to any one of Inventions 1 to 3, wherein the solid poorly water-soluble pesticide active compound contains at least one or more sulfonylurea herbicidal active compounds.

[Invention 5]

The aqueous suspension pesticide composition according to any one of the inventions 1 to 4, wherein the water-soluble polymer dispersant is at least one member selected from the group consisting of polyvinyl alcohol and carboxymethyl cellulose salts.

[Invention 6]

The aqueous solution according to the invention 1 containing a poorly water-soluble pesticide active compound, sucrose fatty acid ester, polyoxyethylene arylphenyl ether phosphate, alkyl sulfate, montmorillonite mineral fine powder, carboxymethyl cellulose salt and water, which are sulfonyl urea herbicidal active compounds. Suspension Pesticide Composition.

[Invention 7]

A method for dispersing a solid, poorly water-soluble pesticide active compound, wherein the aqueous suspension pesticide composition according to the inventions 1 to 5 is directly dispersed in a fresh water faucet.

In the aqueous suspension phase pesticide composition of the present invention, the solid phase is not easily separated and settled under the condition of preservation of the formulation, and it is difficult to produce a hard cake. Moreover, the dispersibility of a solid phase at the time of preparation dilution is favorable.

The aqueous suspension phase pesticide composition of the present invention contains a solid, poorly water-soluble pesticide active compound, a sucrose fatty acid ester, an anionic surfactant, a montmorillonite mineral fine powder, a water-soluble polymer dispersant, and water.

The solid poorly water-soluble pesticide active compound in the present invention means a pesticide active compound having a solid at 25 ° C. and a water solubility (pH 7.0) at 20 ° C. of 1000 ppm or less, and is an insecticidal active compound, bactericidal active compound, or herbicidal active compound. , Mixtures thereof and the like. Moreover, it is preferable that it is solid also at 50 degreeC as a solid poorly water-soluble pesticide active compound in this invention.

As a solid poorly water-soluble pesticide active compound in this invention, the following compound is mentioned, for example.

Insecticidal active compounds include, for example, dimethylvinphos, acephate, salityion, benthiocarb, pyrimicarb, mesoyl, Oxamyl, thiodicarb, bensultap, thiocyclam, diflubenzuron, teflubenzuron, chlorfluazuron, boofluazuron Buprofezin, hexythiazox, nitenpyram, clothianidin, clofentezine, pyridaben and the like.

As bactericidal active compounds, for example, thiuram, captan, TPN, phthalide, benomyl, iprodione, mepronil, flutolanil ), Metalaxyl, oxadicil, triadimefon, hexaconazole, kasugamycin, polyoxin, ballidamycin A (validamycin), Mildio Mycinin (mildiomycin), PCNB, hydroxyisoxazole, dazomet, dimethirimol, diclomezine, triazin, triazin, ferimzone, propenazole propenazol, isoprothiolane, tricyclazol, pyroquilon, dilocymet, furametpyr, carpropamid and the like. Can be.

Herbicidal active compounds include symetrin, daimuron, propanil, mefenacet, pentrazamide, etobenzanid, swep , Oxaziclomefon, oxadiazolon, pyrazolate, prodimin, prodiamin, cafenstrole, pentoxazone, clomeprop, clomeprop, blood Pyriftalid, benzobicyclon, bromobutide, and the like.

The aqueous suspension pesticide composition of the present invention is preferred for a pesticide composition containing at least one sulfonylurea herbicidal active compound, in particular

[Wherein Z represents CH or a nitrogen atom, R ¹ represents a hydrogen atom, a halogen atom, a cyano group, a nitro group, a lower alkyl group which may be substituted with a halogen, a lower alkoxy group which may be substituted with a halogen, a lower alkyl tea O, a lower alkylsulfinyl group, a lower alkylsulfonyl group, an amino group, a lower alkylamino group or a di lower alkylamino group, R ² represents a lower alkyl group which may be substituted with a hydrogen atom, a halogen atom or a halogen, and R ³ represents a halogen atom , Lower alkyl group optionally substituted with cyano group, nitro group, halogen, lower cycloalkyl group optionally substituted with halogen or lower alkyl group, lower alkenyl group optionally substituted with halogen, lower alkynyl group optionally substituted with halogen Lower alkoxy group, lower alkylthio group, lower group which may be substituted by Alkylsulfinyl group, lower alkylsulfonyl group, amino group, lower alkylamino group or di lower alkylamino group.

It is preferable for the agrochemical composition containing the sulfonylurea herbicidal active compound which has a condensed heterocyclic group represented by the following. Such sulfonylurea herbicidally active compounds include 1- (2-chloroimidazo [1,2-a] pyridin-3-ylsulfonyl) -3- (4,6-dimethoxypyrimidine-2 -Yl) urea [imazosulfuron], 1- (4,6-dimethoxypyrimidin-2-yl) -3- (2-ethylsulfonylimidazo [1,2-a] pyridine -3-ylsulfonyl) urea [sulfosulfuron], 1- (2-chloro-6-propylimidazo [1,2-b] pyridazine-3-ylsulfonyl) -3- (4, 6-dimethoxypyrimidin-2-yl) urea is mentioned.

Of course, the aqueous suspension pesticide composition of this invention may contain pesticide active compounds other than a solid, poorly water-soluble pesticide active compound.

In the aqueous suspension pesticide composition of the present invention, the solid poorly water-soluble pesticide active compound is usually contained in an amount of 0.5 to 50% by weight, preferably 1 to 40% by weight.

Sucrose fatty acid ester is a surfactant component having a sucrose portion as a hydrophilic portion and a fatty acid portion as a hydrophobic portion, for example, sucrose and fatty acid methyl (for example, methyl stearate, methyl palmitate, methyl oleate, etc.). It is produced by esterifying usually 1-3 of the hydroxyl groups in sucrose by transesterification in a solvent such as dimethylformamide. Sucrose fatty acid ester is commercially available, For example, what is marketed, such as Neucargen FS-100 (made by Takemoto fats and oils), DK ester S-160 (made by Daiichi Kogyo Pharmaceutical Co., Ltd.), can be used as it is.

In the aqueous suspension pesticide composition of the present invention, sucrose fatty acid ester is usually contained 0.1 to 5% by weight.

As the anionic surfactant, for example, polyoxyethylenated arylphenyl ether phosphate (specifically, nucargen FS-3EG: manufactured by Takemoto Fatty Acid), polyoxyethylene arylphenyl ether sulfate (polyoxyethylenated arylphenyl ether sulfate) (for example, Agrisol FL-2017: manufactured by Cao), polyoxyalkylene arylphenyl ether sulfate (for example, Newcargen FS-7: Takemoto fat and oil), alkyl sulfate ( As a specific example, Monogen Y-500: Daiichi Kogyo Pharmaceutical Co., Ltd., dialkyl sulfosuccinate (specific example Neocol YSK: Daiichi Kogyo Pharmaceutical Co., Ltd., Sanmori OT-70: Sanyo Chemical Industries Production) and mixtures thereof, and among them, polyoxyethylene arylphenyl ether phosphate, alkyl sulfates and mixtures of both are preferable.

In the aqueous suspension pesticide composition of the present invention, the anionic surfactant is usually contained 0.1 to 5% by weight.

The montmorillonite mineral fine powder is a powder of water-swellable clay minerals mainly composed of sodium (Na) montmorillonite or calcium (Ca) montmorillonite, and usually has a sieve content of 40 µm or more in a 75% by weight sieve. In the present invention, the montmorillonite mineral fine powder is a mineral fine powder having a swelling force of 5 to 70 ml / 2 g by the ACC method. As the montmorillonite-based fine mineral powder, generally commercially available bentonite or high purity montmorillonite can be used. As commercially available products of bentonite, super clay (manufactured by Jojun), Kunigel VA, Kunigel V1 (all manufactured by Kunimine Industries), and commercially available products of high-purity montmorillonite are Kunipia F and Kunipia K (all manufactured by Kunimimine Industries). ), Bengel, Bengel HVP (all are aiming).

In the aqueous suspension pesticide composition of the present invention, the montmorillonite mineral fine powder is usually contained in an amount of 0.1 to 3% by weight, preferably 0.2 to 2% by weight.

In the present invention, as the montmorillonite mineral fine powder, one having a swelling force of 30 or more by the ACC method is preferably used.

The water-soluble polymer dispersant includes a water-soluble natural polymer dispersant, a water-soluble semisynthetic polymer dispersant, and a water-soluble synthetic polymer dispersant. Examples of the water-soluble natural polymer dispersant include sodium alginate, gum arabic, guar gum and xanthan gum. Examples of the water-soluble semisynthetic polymer-based dispersant include cellulose-based dispersants such as carboxymethyl cellulose salts. Examples of the water-soluble synthetic polymer-based dispersants include polyvinyl alcohol and polyvinylpyrrolidone. ), And the like.

A commercially available water-soluble polymer dispersant can be used as it is. Examples of commercially available products include polyvinyl alcohols such as Gosenol GL-03 (manufactured by Nippon Synthetic Chemical Industry), Kosenol KL-05 (manufactured by Nippon Synthetic Chemical Industry), and Kurarepobal PVA-224 (manufactured by Kuraray), and serogens. Carboxymethyl cellulose salts, such as 6A (made by Daiichi Kogyo Pharmaceutical Co., Ltd.), serogen 7A (made by Daiichi Kogyo Pharmaceutical Co., Ltd.), CMC Daicel 1110 (made by Daicel Chemical Industry), CMC Daicel 1210 (made by Daicel Chemical Industry), And polyol derivatives such as xanthan gum such as Kerzan (manufactured by Sanyo Chemical Industries), Rodpole 23 (manufactured by Ronufuran), and Agrisol FL-104FA (manufactured by Kao).

As the water-soluble polymer dispersant used in the present invention, one having a relatively small viscosity when dissolved in water is preferable. For example, the polyvinyl alcohol whose viscosity in 4 weight% aqueous solution is 1-25 mPa * s (Hepra viscometer, 20 degreeC), and the viscosity in 2 weight% aqueous solution are 1-100 mPa * s (B type viscometer, 60 rpm, 25 ° C.) is preferred.

Examples of the polyvinyl alcohol having a viscosity of 1 to 25 mPa · s (hepra viscometer, 20 ° C.) in a 4 wt% aqueous solution include polyvinyl alcohol having a saponification degree in the range of 70 to 95 mol%. Commercially available products such as Nol GL-03 and Gosenol KL-05 (both manufactured by Nippon Synthetic Chemical Industry) are substantial.

As carboxymethyl cellulose salt whose viscosity in 2 weight% aqueous solution is 1-100 mPa * s (B type viscometer, 60 rpm, 25 degreeC), the carboxymethylcellulose salt in which the etherification degree exists in the range of 0.4-1.0 is mentioned. And commercially available products, such as Serogen 7A (made by Daiichi Pharmaceutical Co., Ltd.), are considerable.

In the aqueous suspension pesticide composition of the present invention, the water-soluble polymer dispersant is usually contained in 0.01 to 5% by weight, preferably 0.1 to 3% by weight.

The aqueous suspension pesticide composition of the present invention is a solid poorly water-soluble pesticide active compound, sucrose fatty acid ester, anionic surfactant, montmorillonite-based mineral fine powder, water-soluble polymer dispersant, and the pesticide auxiliaries described further below, It is a composition dispersed or dissolved in an aqueous medium. There is no restriction | limiting in particular in the water which the aqueous suspension pesticide composition of this invention contains, The water which can be used for common pesticide formulations, such as tap water, well water, ion-exchange water, can be used. The water in the aqueous suspension pesticide composition of the present invention is usually 30 to 90% by weight, preferably 50 to 80% by weight.

The aqueous suspension pesticide composition of this invention may contain the pesticide adjuvant used in a normal aqueous suspension pesticide composition in addition to the said component. As an agricultural chemical adjuvant, nonionic surfactant other than a cryoprotectant, a pH adjuster, an antifoamer, a preservative, and a sucrose fatty acid ester is mentioned, for example. These pesticide adjuvants can be suitably selected according to the kind and content of a solid, poorly water-soluble pesticide active compound.

As a nonionic surfactant, For example, polyoxyethylene polyoxypropylene block polymer (Nupole PE68: Dai-ichi Kogyo Pharmaceutical Co., Ltd.), polyoxyalkylene polyalkylene polyamine (Nucargen D-3020: Takemoto fats and oils production), Polyoxyethylene alkyl phenyl ether (Nucargen D-410: Takemoto fats and oils), polyoxyethylene aryl phenyl ether formaldehyde condensate (Nu cargen E-300: Takemoto fats and oils) is mentioned.

As an antifreezing agent, ethylene glycol, diethylene glycol, glycerin, propylene glycol is mentioned, for example.

As a pH adjuster, citric acid monohydrate, sorbic acid, potassium sorbate is mentioned, for example.

As an antifoamer, a silicone type antifoamer is mentioned, for example.

As a preservative, butyl paraben (n-butyl parahydroxy benzoate), sorbic acid, potassium sorbate is mentioned, for example.

When the cryoprotectant is used, the aqueous suspension phase pesticide composition of the present invention is usually in the range of 1 to 20% by weight, preferably 3 to 12% by weight.

When a pH adjuster is used, it is 0.01 to 5 weight% normally with respect to the aqueous suspension pesticide composition of this invention, Preferably it exists in the range of 0.5 to 3 weight%.

When an antifoamer is used, it is 0.05-0.5 weight% normally with respect to the aqueous suspension pesticide composition of this invention, Preferably it exists in the range of 0.05-0.3 weight%.

When a preservative is used, it is usually in the range of 0.01 to 3% by weight, preferably 0.01 to 1.5% by weight based on the aqueous suspension pesticide composition of the present invention.

The following are illustrated as an aspect of the aqueous suspension pesticide composition in this invention.

0.5 to 50% by weight of poorly water-soluble pesticide active compound, 0.1 to 5% by weight of sucrose fatty acid ester, 0.1 to 5% by weight of anionic surfactant, 0.1 to 3% by weight of montmorillonite mineral fine powder, 0.1 to 5% by weight of water-soluble polymer dispersant And aqueous suspension pesticide compositions containing water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspension phase pesticide composition containing 0.1 to 5% by weight of a water-soluble polymer dispersant, and water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspended pesticide composition comprising 0.1 to 5% by weight of polyvinyl alcohol and / or carboxymethylcellulose salt, and water.

0.5 to 50% by weight of poorly water-soluble pesticide active compound, 0.1 to 5% by weight of sucrose fatty acid ester, 0.1 to 5% by weight of anionic surfactant, 0.1 to 3% by weight of montmorillonite mineral fine powder, 0.1 to 5% by weight of water-soluble polymer dispersant And 50-80% by weight of water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspension phase pesticide composition containing 0.1 to 5% by weight of a water-soluble polymer dispersant, and 50 to 80% by weight of water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspension phase pesticide composition containing 0.1 to 5% by weight of polyvinyl alcohol and / or carboxymethylcellulose salt, and 50 to 80% by weight of water.

0.5 to 50% by weight of poorly water-soluble pesticide active compound, 0.1 to 5% by weight of sucrose fatty acid ester, 0.1 to 5% by weight of anionic surfactant, 0.1 to 3% by weight of montmorillonite mineral fine powder, 0.1 to 5% by weight of water-soluble polymer dispersant , An aqueous suspension pesticide composition substantially consisting of agrochemical aids, and water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspension pesticide composition substantially consisting of 0.1 to 5% by weight of a water-soluble polymer dispersant, pesticide aid, and water.

0.5 to 50% by weight of poorly water-soluble pesticide active compounds, 0.1 to 5% by weight of sucrose fatty acid esters, 0.1 to 5% by weight of polyoxyethylenearylphenylether phosphate and / or alkyl sulfates, 0.1 to 3% by weight of montmorillonite mineral fine powder, An aqueous suspension pesticide composition substantially consisting of 0.1% to 5% by weight of polyvinyl alcohol and / or carboxymethylcellulose salt, pesticide aid, and water.

The aqueous suspension pesticide composition of this invention can be manufactured by the method shown below, for example.

Solid, poorly water-soluble pesticide active compounds, sucrose fatty acid esters, anionic surfactants, montmorillonite mineral fine powders, water-soluble polymer dispersants, and other pesticide aids, if desired, are added to water and the mixture is, for example, in a high speed stirrer. After the mixture is sufficiently stirred and mixed, the fine powder is dispersed and dispersed in a wet mill such as a dynomil or a microfluidizer (Manufacturing Method 1), or the raw material of a solid, poorly water-soluble pesticide active compound is produced by a jetizer or the like. After pulverizing by a dry grinder, this is added to water together with another component, and the method (Manufacturing method 2) which disperse | mixes and mixes and disperses this mixture with a high speed stirrer for about 30 to 90 minutes is mentioned.

In the present invention, the solid, poorly water-soluble pesticide active compound is dispersed in the form of fine particles in water, and the average particle diameter of the fine particles is 10 μm or less, preferably 0.2 to 5 μm.

The aqueous suspended pesticide composition of the present invention can be used by diluting with water as it is or according to a known method, or as desired, for example, and may be directly dispersed from a shelter or the like under a freshwater faucet. When dispersing the aqueous suspension pesticide composition of the present invention as it is in a faucet or the like, the container containing the aqueous suspension pesticide composition of the present invention is shaken lightly before use, and then used by dispersing it in small portions along the half-life. When the aqueous suspension-type pesticide composition of the present invention is diluted with water and dispersed, it is used by soil surface spreading, foliage spreading, and the like using a well-known spreader or the like in a faucet, a field, an orchard, a lawn, a non-cropland, and the like. Moreover, it can also be used for seed treatment, seedling processing, etc. using this water dilution liquid.

Example

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Preparation Example 1

1.7 parts by weight of imazosulfuron, 16.3 parts by weight of bromobutide, 7.0 parts by weight of pentoxazone, 7.0 parts by weight of ethylene glycol, 0.1 parts by weight of sorbic acid, anti-home E-20 (silicone antifoaming agent, Cao produced) 0.3 parts by weight, Neucargen FS-100 (sucrose fatty acid ester, Takemoto fats and oils) 2.0 parts by weight, Neucargen FS-3EG (polyoxyethylene arylphenyl ether phosphate amine salt, Takemoto fats and oils) 2.0 parts by weight , 1.0 parts by weight of Kunipia F (sodium montmorillonite, Kunimine Industries) and 0.50 parts by weight of Serogen 7A (sodium carboxymethylcellulose, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) were added with ion-exchanged water and mixed in an amount of 100 parts by weight. After dispersion, it was wet pulverized using Dinomil KDL (manufactured by Shinmal Enterprises Co., Ltd.) to obtain a uniform aqueous suspended pesticide composition (1).

Preparation Example 2

1.7 parts by weight of imazosulfuron, 16.3 parts by weight of bromobutide, 7.0 parts by weight of pentoxazone, 8.0 parts by weight of ethylene glycol, 0.1 parts by weight of sorbic acid, and anti-home E-20 (silicone antifoaming agent) 0.3 parts by weight, Neukargen FS-100 (sucrose fatty acid ester, Takemoto fats and oils) 2.0 parts by weight, Agrisol FL-2017 (polyoxyethylene phenylphenol ether sulfate, manufactured by Cao) 1.0 part by weight, neocoll YSK (dioctyl 1.0 parts by weight of sodium sulfosuccinate, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., 1.0 part by weight of Kunibia F (sodium montmorillonite, Kunimine Industries), and 0.50 parts by weight of Serogen 7A (sodium carboxymethylcellulose, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) After exchanged water was added and the total amount thereof was 100 parts by weight, mixed and dispersed, wet grinding was performed using Dinomil KDL (manufactured by Shinmal Enterprise Co., Ltd.) to obtain a uniform aqueous suspended pesticide composition (2). Got it.

Preparation Example 3

1.8 parts by weight of imazosulfuron, 0.1 parts by weight of sorbic acid, 0.3 parts by weight of anti-homogen E-20 (silicone antifoaming agent, manufactured by Cao), 0.5 parts by weight of Neukargen FS-100 (manufacture of sucrose fatty acid ester, Takemoto fats and oils) , Neukargen FS-3EG (polyoxyethylene arylphenyl ether phosphate amine salt, Takemoto fats and oils) 0.8 part by weight, Monogen Y-500 (sodium lauryl sulfate, Daiichi Kogyo Pharmaceutical Co., Ltd.), 0.2 part by weight, and Kunipia After adding 30.3 parts by weight of ion-exchanged water to 1.0 parts by weight of F (sodium montmorillonite, Kunimine Industries Co., Ltd.), mixing and dispersing, wet grinding was performed using Dinomil KDL (manufactured by Nippon Enterprise Corporation) to prepare a suspension (3). do. On the other hand, 2.0 weight part of serogen 7A (sodium carboxymethylcellulose, Dai-ichi Kogyo Pharmaceutical Co., Ltd. product) is added to 53.4 weight part of ion-exchange water, and the aqueous solution 3 is prepared. To the suspension (3), an aqueous solution (3) and 9.6 parts by weight of ethylene glycol are added and stirred and mixed to obtain a uniform aqueous suspended pesticide composition (3).

Preparation Example 4

1.9 parts by weight of imazosulfuron, 6.0 parts by weight of carfenstrole, 8.6 parts by weight of ethylene glycol, 0.1 parts by weight of sorbic acid, 0.3 parts by weight of anti-home E-20 (silicone antifoaming agent, manufactured by Cao), Newkar 1.0 parts by weight of Gen FS-100 (sucrose fatty acid ester, Takemoto fats and oils), 0.8 parts by weight of Neukargen FS-3EG (polyoxyethylene arylphenyl ether phosphate amine salt, Takemoto fats and oils), Monogen Y-500 (lauryl 3 parts by weight of ion-exchanged water was added to 0.2 parts by weight of sodium sulfate, Daiichi Kogyo Pharmaceutical Co., Ltd. and 1.0 parts by weight of Kunipia F (sodium montmorillonite, Kunimine Industries), followed by mixing and dispersing. The suspension 4 is prepared by wet grinding using a frise product). On the other hand, 1.0 weight part of serogen 7A (sodium carboxymethylcellulose, Dai-ichi Kogyo Pharmaceutical Co., Ltd. product) is added to 49.0 weight part of ion-exchange water, and the aqueous solution 4 is prepared. An aqueous solution 4 is added to the suspension 4 and stirred and mixed to obtain a uniform aqueous suspended pesticide composition 4.

Comparative Production Example 1

1.7 parts by weight of imazosulfuron, 16.3 parts by weight of bromobutide, 7.0 parts by weight of pentoxazone, 8.0 parts by weight of ethylene glycol, 0.1 parts by weight of sorbic acid, and anti-home E-20 (silicone antifoaming agent) 0.3 part by weight, 2.0 parts by weight of Neukargen FS-100 (sucrose fatty acid ester, manufactured by Takemoto Oil Fat), 2.0 parts by weight of Agrisol FL-2017 (polyoxyethylenephenylphenol ether sulfate, manufactured by Cao), aerosil COK84 ( 2.0 parts by weight of high purity anhydrous silica, manufactured by Nippon Aerogel, and 5.0 parts by weight of Agrisol FL-104FA (polyol derivative, manufactured by Cao) were added and ion-exchanged water, and the total amount was 100 parts by weight, followed by mixing and dispersing. Wet grinding using Dinomil KDL (manufactured by Nippon Enterprise Co., Ltd.) to obtain a uniform comparative aqueous suspended pesticide composition (1).

The following test was done about the prepared aqueous suspension pesticide composition. The measurement results are collectively shown in Table 2.

Test Example 1 (particle size measurement)

The volume median diameter was measured using a laser diffraction particle size distribution measuring device (HEROS & RODOS, manufactured by Nippon Laser, measuring conditions: focal length 20 mm, and dispersion medium as ion exchanged water).

Test Example 2 (pH measurement)

The pH of the aqueous suspension phase pesticide composition was measured using a pH meter (type F-22, Horiba Corporation).

Test Example 3 (Amount of Cake)

About 40 g of the aqueous suspension pesticide composition was placed in a 50 ml original needle tube, and centrifuged at 800 rpm for 6 hours. After centrifugation, the aqueous suspension pesticide composition was discharged in an upright position with the inlet of the centrifuge tube facing downward, and discharge was terminated when the time interval at which the droplets dropped fell longer than 10 seconds. The weight of the aqueous suspension pesticide composition remaining in the original needle tube at the end of discharge was measured, and the percentage of the value divided by the total weight of the aqueous suspension pesticide composition used for the test was calculated as the cake ratio.

Test Example 4 (Diffuse Underwater)

A glass container (filter: 4, inner diameter: 3.5 cm, height: 4.7 cm, capacity: about 50 ml) having a water drain at the bottom and a drain at the top, and a glass filter disposed at the inside of the bottom. Filled with 10 degree hard water inside. 0.2 ml of an aqueous suspension pesticide composition was poured slowly using the dropper from the drain opening side to the vicinity of the glass filter, and was added. Thereafter, 10-degree hard water was injected at 2.5 ml per minute from the water inlet of the bottom of the glass container for 3 hours, and water discharged from the upper drain port was collected.

The amount of the pesticide active compound in the discharged water was quantified, and the percentage of the value divided by the amount of the pesticide active compound in the aqueous suspension pesticide composition used for the test was calculated as the diffusion rate in water.

Example 1 Example 2 Comparative Example 1 Volume median diameter (μm) 2.5 2.7 2.6 pH 4.9 5.2 4.5 60 ℃ immediately after preparation of cake ratio, after 8 days  5% unmeasured  5% 6%  39% 40% Diffusion Rate of Imazosulfuron Bromobutide Pentoxazone  98% 96% 96%  98% about 100% 95%  76% 68% 54%

The aqueous suspended pesticide composition of the present invention is difficult to produce hard cakes because the solid phase is not easily separated and settled under the conditions of preparation of the preparation.

Claims (7)

An aqueous suspended phase pesticide composition comprising a solid, poorly water-soluble pesticide active compound, a sucrose fatty acid ester, an anionic surfactant, a montmorillonite mineral fine powder, a water-soluble polymer dispersant, and water. The method of claim 1, 0.5 to 50% by weight of poorly water-soluble pesticide active compound, 0.1 to 5% by weight of sucrose fatty acid ester, 0.1 to 5% by weight of anionic surfactant, 0.1 to 3% by weight of montmorillonite mineral fine powder, 0.1 to 5% by weight of water-soluble polymer dispersant An aqueous suspension pesticide composition containing%. The method according to claim 1 or 2, An aqueous suspending pesticide composition wherein the anionic surfactant is at least one member selected from the group consisting of polyoxyethylene arylphenyl ether phosphates and alkyl sulfates. The method according to claim 1 or 2, An aqueous suspension phase pesticide composition containing at least one sulfonylurea herbicidal active compound as a solid poorly water-soluble pesticide active compound. The method according to claim 1 or 2, An aqueous suspended pesticide composition wherein the water-soluble polymer dispersant is at least one member selected from the group consisting of polyvinyl alcohol and carboxymethyl cellulose salts. The method of claim 1, Aqueous suspended aqueous pesticide composition containing a solid, poorly water-soluble pesticide active compound which is a sulfonylurea herbicidal active compound, sucrose fatty acid ester, polyoxyethylene arylphenyl ether phosphate, alkyl sulfate, montmorillonite mineral fine powder, carboxymethylcellulose salt and water . A pesticide spreading method in which the aqueous suspension-type pesticide composition according to claim 1 is directly distributed before fresh water under fresh water.